Parse all vmess urls from one html file and write them into a text file. for batch importing to your client.

Main.java

import java.io.*;
import java.util.HashSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

    private static final String PRE_PATH = "";

    public static void main(String[] args) {
        HashSet<String> result = new HashSet<>();
        String a = getFileContent();
        String reg = "\"vmess.*?\"";
        Matcher m = Pattern.compile(reg, Pattern.DOTALL).matcher(a);
        while (m.find()) {
            String r = m.group(0);
            result.add(r);
        }
        if (!result.isEmpty()) {
            writeResults(result);
        }
    }

    public static String getFileContent() {
        File file = new File(PRE_PATH + "html.txt");
        StringBuffer sb = new StringBuffer();
        try {
            Reader reader = new InputStreamReader(new FileInputStream(file), "UTF-8");
            int len = 0;
            for (char[] c = new char[1024]; (len = reader.read(c)) != -1; ) {
                sb.append(c, 0, len);
            }
            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }

    public static void writeResults(HashSet<String> results) {
        try {
            File file = new File(PRE_PATH + "results.txt");
            if (file.exists()) {
                file.delete();
            }
            file.createNewFile();
            OutputStream outputStream = new FileOutputStream(file);
            PrintStream printStream = new PrintStream(outputStream);
            for (String result : results) {
                printStream.println(result.replaceAll("\"", ""));
            }
            printStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}